THE DIELECTRIC RELAXATION TIME OF 1,3BUTANEDIOL AS A FUNCTION OF FREE VOLUME,

摘要

The report presents dielectric data on 1,3-butanediol in the temperature range of -36C to 51.2C and at pressures from one to three thousand atmospheres. Tables of the static dielectric constant,the infinite frequency dielectric constant,the limiting dielectric relaxation time and the distribution parameter of the Davidson-Cole distribution,are given. In an attempt to explain the temperature-pressure dependence of the dielectric relaxation time,the free volume approach as proposed by Litovitz and Macedo is utilized. In order to fit the dielectric data of this report,it was necessary to slightly modify the free volume equation as presented by these authors through the introduction of a temperature dependent close packed molecular volume.